Concept

Retainage Buffer Addition to Cash Reserve Target

After calculating the fixed-cost coverage target, add a retainage buffer. If 5–10 % of billings are held back as retainage until project completion, that money is unavailable for operations even though it appears on the books as an asset. Model the typical retainage balance as cash the contractor cannot touch, and add it to the reserve target. Revisit this adjustment quarterly as project sizes and retainage percentages change.

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Updated 2026-05-04

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